<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input v-model="isAll" type="checkbox" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <shopcar
          @delgoods="delgoodsHandler(index)"
          :goods="item"
          v-for="(item, index) in goodList"
          :key="index"
        ></shopcar>
      </tbody>
      <tfoot>
        <tr>
          <td>合计: {{allPrice}} </td>
          <td colspan="5"></td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import shopcar from "./components/7-购物车.vue";

export default {
  components: {
    shopcar,
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  computed: {
    isAll: {
      set(val) {
        this.goodList.forEach((item) => (item.checked = val));
      },
      get(){
        return this.goodList.every(item => item.checked)
      }
    },
    allPrice(){
     let num = this.goodList.reduce((sum,item)=>{
       if (item.checked){
         return sum + item.price*item.num
       }else{
         return sum + 0
       }
     },0)
     return num
    }
  },
  methods: {
    delgoodsHandler(index) {
      this.goodList.splice(index, 1);
    },
  },
};
</script>

<style lang="css" scoped>
</style>